Check this out. A 270 slant 6

Okay Rusty but in Australia we did not get 170 or 198. Only 225 so we are a bit ignorant of anything other than 225! But we did get your still born 215, 245 and 265 Hemi sixes and they make great power as in the day in motoring testers always rated a 265 faster than a 318 in the same car!